Outdoor Air Switches

Switch Operating Mechanisms - Electrical

MO-10 NG Design Features

Overview The MO-10NG motor operator is a state of the art design utilizing Programmable Logic Controllers (PLC) to provide a variety of configurable options. A Human Machine Interface (HMI) screen provides reliable, secure and straightforward configuration of the MO-10NG. The MO-10NG includes a wide range of functions that can be configured prior to shipment or in the field through the menu screen of the HMI. The features include:

x Voltage Options of 24, 48, 125 & 250 VDC and 120, 240 VAC x Pushbuttons (Open, Close and Stop) x Local and/or Remote operation x Operation time delay and counter x Six custom outputs x Positive electro-mechanical Open and Close limit switches

x Open and Close speed control x Watch Dog condition monitoring

Open and Close Speed Control EHV disconnect switches can exhibit blade bounce at the end of an open or close operation due to the length of the blade and operating time of traditional motor operators. The MO-10 NG code incorporates a speed control menu that allows for four separate open and close sectors that are variable in duration. Motor speed can be set between 5 and 100% in each of the sectors. Utilizing the variable sectors and range of motor speed allows for control of the switch blade throughout its travel and virtually eliminates blade bounce. Watch Dog Condition Monitoring Condition monitoring is achieved by capturing motor current and operating time measurements. Once the MO-10NG and associated disconnect switch have been adjusted, the motor current and operating time can be archived. All subsequent operations are then compared to the archive data. A trending screen is also incorporated on the HMI screen which shows the last open and close operation as well as the motor current. Increases in the motor current and operating time are key indicators that a switch requires maintenance. The data obtained can be easily downloaded from a USB port on the HMI. In addition to the motor current and operating time the date and time of each operation is also recorded. Once saved to a flash drive, the data can easily be imported into an Excel spreadsheet.

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HMI Home Screen

HMI Operations Screen

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